Skip Navigation

Close and don't show again.

Your browser is out of date.

You may not get the full experience here on National Journal.

Please upgrade your browser to any of the following supported browsers:

Dawn Spacecraft Offers New Views of Asteroid Vesta’s Surface -- PICTURES Dawn Spacecraft Offers New Views of Asteroid Vesta’s Surface -- PICT...

NEXT :
This ad will end in seconds
 
Close X

Not a member or subscriber? Learn More »

Forget Your Password?

Don't have an account? Register »

Reveal Navigation
 

 

Tech / SPACE

Dawn Spacecraft Offers New Views of Asteroid Vesta’s Surface -- PICTURES

photo of Adam  Mazmanian
May 10, 2012

NASA released images from its probe of the large asteroid Vesta taken from the Dawn spacecraft on Thursday, and said the images support the theory that meteorites found on Earth came from it. 

Vesta is considered to be a proto-planet, more akin to the Earth’s moon or a small planet than a typical asteroid. It’s unique in our solar system as a survivor of the era about 4.5 billion years ago, when the planets accreted from bodies much like Vesta to form Earth, Mars, Venus and Mercury. Like these planets, it has an iron core, a mantle and a surface crust.

Vesta resides in the asteroid belt between Mars and Jupiter, and was about 117 million miles from Earth when Dawn arrived in mid-2011. NASA has extended Dawn’s mission at Vesta by 40 days, allowing the spacecraft to continue its observations of the asteroid through August 26, before it leaves for the dwarf planet Ceres.

This rendering shows Vesta in perspective with its nearest planetary neighbor, Mars, as well as Mercury, Earth and the large planet-like body Ceres, which is the next stop on Dawn’s 3 billion mile mission (to see Vesta, minimize this caption using the arrow on the right).(NASA)

Images from Dawn’s framing camera were used to create this view of the Rheasilvia impact basin near Vesta’s south pole. The color code on the bottom image indicates the topography: the blue areas indicate depressions; the red areas show elevations.(NASA)

Vesta’s southern hemisphere shows a remarkable level of mineral diversity, as captured by Dawn’s spectrometer. Scientists believe the way the minerals are arrayed suggests that it melted early in its history.  

 

These mineral samples, viewed through a polarizing microscope, are from asteroids that, scientists have now confirmed, come from Vesta. (NASA)

These three views of the Vibidia crater show the topography and composition of the  40-mile by 40-mile depression. The images used to create this composite view were taken during Dawn’s high-altitude mapping orbit, when the spacecraft was 420 miles above Vesta.(NASA)

This image shows a 2,000 square mile swath of Vesta’s southern hemisphere, with a focus on the Canuleia crater.(NASA)

 

Scientists aren’t sure what’s behind the mix of light and dark material at the rim of the Marcia crater. Explanations range from weathering, to impacts from nearby asteroids, to volcanic activity.

Dawn captured this close-up view of Vesta’s Rheasilvia impact basin during its low-altitude mapping orbit, which took it to about 130 miles above the asteroid.(NASA)

Images of areas around Vesta’s equator reveal craters that were filled in by materials thrown up in the collisions that created the Rheasilvia basin.(NASA)

 

Vesta’s south pole, as photographed by Dawn at a distance of about 1,700 miles.(NASA)

Job Board
Search Jobs
Sr. Structural Engineer
American Society of Civil Engineers | MD
Civil PE / Project Manager
American Society of Civil Engineers | Irvine, CA
Section Manager Quality
American Society of Civil Engineers | Worcester, MA
Professional Civil Engineer
American Society of Civil Engineers | Pensacola, FL
Biomedical Service Internship Position
American Society of Civil Engineers | Flint, MI
Land Development Project Manager II
American Society of Civil Engineers | Irvine, CA
Lead Structural Engineer
American Society of Civil Engineers | Durham, NC
Southern California Office-Field Engineer
American Society of Civil Engineers | CA
ASSISTANT OR ASSOCIATE PROFESSOR OF GEOLOGICAL ENGINEERING
American Society of Civil Engineers | Grand Forks, ND
Project Engineer
American Society of Civil Engineers | Northbrook, IL
Drainage Engineer
American Society of Civil Engineers | Tampa, FL
Planner II
American Society of Civil Engineers | Billings, MT
Quality Assurance Technician / Inspector
American Society of Civil Engineers | Poughkeepsie, NY
Pavement Engineer - Airports
American Society of Civil Engineers | Beltsville, MD
Maintenance Engineer Leader
American Society of Civil Engineers | Fowlerville, MI
 
Comments
comments powered by Disqus